1FEMALEThe sows usually have a smooth swelling over their genital area. Sometimes, it can be bumpy looking, making you think it might be a male! If you gently part the genital opening, on a sow, a "Y" shaped opening should appear. (pig 1)

2MALESlight pressure applied to get penis to extrude.(pig 2)

3Female, Baby, 12 hours oldUmbilical cord still attached(pig 3)

4Male, Baby, 12 hours oldUmbilical cord still attached(pig 4)

5Female, Baby, 12 hours oldAlternate angle photo(pig 3)

6Male, Baby, 12 hours oldAlternate photo(pig 4)

7Female, 3 weeks old(pig 5)

8Male, 3 weeks old(pig 6)

9Female, 3 weeks oldAlternate photo(pig 5)

10Male, 3 weeks oldGently applying pressure just above genital area with thumb in order to get penis to extrude.(pig 6)

11Female, Adult(pig 7)

12Male, Adolescent(pig 8)

13Female, Adult(pig 7)

14Male, Adolescent(pig 8)

15Female, Adult(pig 7)

16Male, Adolescent(pig 8)

17Male, Adult(pig 9)

18Male, Adult(pig 9)

19Male, Adult(pig 9)

20Male, Adult(pig 10)

21Male, Adult(pig 10)

22Male, Adult(pig 10)

23Male, AdultIt should usually be pretty easy to sex an adult male -- especially in this case. Note on this photo how you can see the ridge of the shaft underneath the skin between the testicles. This is the same 'ridge' that you feel for in babies and young boars as well.(pig 11)

24Male, AdultThis is the backside of the pig. Pretty obvious testicles.(pig 11)

25Male, NEUTERED, YoungTesticle area is very much smaller. No large donut shape.(pig 12)

26Male, NEUTERED, YoungOf course, you can still get a penis to extrude on a neutered male.(pig 12)

27Male, NEUTERED, AdultNote the testical area is significantly smaller than an 'intact' male.(pig 13)